DOI: 10.1016/j.atmosenv.2014.01.053
Scopus记录号: 2-s2.0-84893905743
论文题名: Influence of spatial and temporal variability of subsurface soil moisture and temperature on vapour intrusion
作者: Bekele D ; N ; , Naidu R ; , Chadalavada S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 88 起始页码: 14
结束页码: 22
语种: 英语
英文关键词: Risk assessment
; Site screening
; Spatial variation
; Temporal variation
; Trichloroethylene
; Vapour intrusion
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: A comprehensive field study was conducted at a site contaminated with chlorinated solvents, mainly trichloroethylene (TCE), to investigate the influence of subsurface soil moisture and temperature on vapour intrusion (VI) into built structures. Existing approaches to predict the risk of VI intrusion into buildings assume homogeneous or discrete layers in the vadose zone through which TCE migrates from an underlying source zone. In reality, the subsurface of the majority of contaminated sites will be subject to significant variations in moisture and temperature. Detailed site-specific data were measured contemporaneously to evaluate the impact of spatial and temporal variability of subsurface soil properties on VI exposure assessment. The results revealed that indoor air vapour concentrations would be affected by spatial and temporal variability of subsurface soil moisture and temperature. The monthly monitoring of soil-gas concentrations over a period of one year at a depth of 3m across the study site demonstrated significant variation in TCE vapour concentrations, which ranged from 480 to 629,308μg/m3. Soil-gas wells at 1m depth exhibited high seasonal variability in TCE vapour concentrations with a coefficient of variation 1.02 in comparison with values of 0.88 and 0.74 in 2m and 3m wells, respectively. Contour plots of the soil-gas TCE plume during wet and dry seasons showed that the plume moved across the site, hence locations of soil-gas monitoring wells for human risk assessment is a site specific decision. Subsurface soil-gas vapour plume characterisation at the study site demonstrates that assessment for VI is greatly influenced by subsurface soil properties such as temperature and moisture that fluctuate with the seasons of the year. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80698
Appears in Collections: 气候变化事实与影响
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作者单位: Centre for Environmental Risk Assessment and Remediation, Building X (Environmental Sciences Building), University of South Australia, Mawson Lakes, SA 5095, Australia; CRC for Contamination Assessment and Remediation of the Environment, Building X (Environmental Sciences Building), University of South Australia, Mawson Lakes, SA 5095, Australia
Recommended Citation:
Bekele D,N,, Naidu R,et al. Influence of spatial and temporal variability of subsurface soil moisture and temperature on vapour intrusion[J]. Atmospheric Environment,2014-01-01,88